/*
 * Copyright (C) 2017-2019 Dremio Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dremio.exec.store;

import java.util.Map;

import org.apache.arrow.memory.OutOfMemoryException;
import org.apache.arrow.vector.ValueVector;

import com.dremio.common.exceptions.ExecutionSetupException;
import com.dremio.sabot.op.scan.OutputMutator;

public class EmptyRecordReader implements RecordReader {

  @Override
  public void close() throws Exception {
  }

  @Override
  public void setup(OutputMutator output) throws ExecutionSetupException {
  }

  @Override
  public void allocate(Map<String, ValueVector> vectorMap) throws OutOfMemoryException {
    for (final ValueVector v : vectorMap.values()) {
      v.allocateNew();
    }
  }

  @Override
  public int next() {
    return 0;
  }

}
